package com.iwy.hadoop.mapreduce;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

/**
 * @Author weibi
 * @Date 2021/1/21 9:26
 * @Description //TODO
 */
public class WordcountMapper extends Mapper<LongWritable, Text, Text, IntWritable> {


    Text k = new Text();
    IntWritable v = new IntWritable(1);

    @Override
    protected void map(LongWritable key, Text value, Context context)
            throws IOException, InterruptedException {

        // 获取一行数据
        String line = value.toString();
        // 切割
        String[] words = line.split(" ");

        for (String word : words) {
            
            k.set(word);

            context.write(k, v);
        }


    }
}
